Manuals / Greenheck Fan / Household Appliance / Gas Heater

Greenheck Fan Troubleshooting Guide for Greenheck Differential Pressure Units in Gas Heaters

Models: 470654

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Troubleshooting

Heater Does Not Operate (Pilot Ignition)

Visible pilot

Measure the flame signal when there is a visible pilot

 

 

 

 

 

Flame signal greater

No

 

 

than 1.25 VDC

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

Check for proper airflow

 

 

 

Reference: Start-Up - Direct Gas, 

 

 

 

Set the Burner Air Pressure Differential, pg. 16

 

 

 

 

 

 

 

 

 

 

 

 

 

Pressure drop across the burner

No

 

 

between 0.625 and 0.675 in. WC?

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

Check the minimum firing rate

 

 

 

Reference: Start-Up - Direct Gas,

 

 

 

Set the Unit’s Operating Temperature, pg. 18

 

 

 

 

 

 

 

 

 

 

 

 

 

Is the minimum firing rate

No

 

 

set correctly?

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

Does the flame signal

No

 

 

remain constant?

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note: The flame signal should be steady and above 1.25 VDC with a visible pilot.

Reference: Start-Up - Direct Gas,

Flame Signal Check - Pilot Ignition, pg. 18

Unit is not grounded.

Properly ground unit.

Flame rod is grounding out.

Adjust the flame rod to avoid contact with the burner or the unit.

Cracked porcelain on flame rod.

Replace flame rod.

Note: When the pressure is low or marginal and the unit

begins heating, the air density will change. This can cause the pressure to drop below the minimum setting. Also, low airflow can cause the flame to walk out of the burner and away from the flame sensor, causing the unit to recycle.

Adjust burner baffles

Reference: Start-Up - Direct Gas, 

Set the Burner Air Pressure Differential, pg. 16

Note: Burners greater than 36 inches in length use an interrupted pilot. The pilot is turned off 10 seconds after lighting the main burner and the flame safeguard monitors the main flame instead of the pilot flame. If the minimum fire is set too low, the flame safeguard may not be able to sense it.

Adjust the minimum firing rate.

Reference: Start-Up - Direct Gas,

Set the Unit’s Operating Temperature, pg. 18

If the signal slowly drops off, typically the airflow is too low.

Reference: Start-Up - Blowers, Set the Maximum Firing Rate

If it suddenly drops to zero, the flame rod is grounding out. Adjust the flame rod to avoid contact with the burner or the unit.

If the flame signal is above 1.25 VDC and constant, the main gas valves will remain open until the call for heat is interrupted or the unit is shut down.

28Model VSU Make-Up Air

®

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Greenheck Fan 470654 manual Visible pilot, Between 0.625 and 0.675 in. WC?
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470654 specifications

Greenheck Fan 470654 is a cutting-edge ventilation solution designed to meet the demanding requirements of commercial and industrial applications. Renowned for its reliability and efficiency, this fan model integrates advanced technologies and engineering to provide optimal air movement and control.

One of the standout features of the Greenheck Fan 470654 is its robust construction. Designed with high-quality materials, the fan promotes longevity and durability, making it suitable for use in tough environments. This fan features a heavy-gauge steel housing that minimizes vibration and enhances noise reduction, contributing to a quieter operation, a critical factor in maintaining a serene working environment.

The fan is equipped with a powerful motor that ensures efficient airflow, achieving high performance while consuming minimal energy. This energy efficiency is emphasized through the use of advanced motor technology, including variable frequency drive (VFD) compatibility. VFDs allow for precise control of the fan speed, enabling adjustments based on system demand, thus significantly reducing energy consumption and operating costs.

In terms of airflow performance, the Greenheck Fan 470654 is engineered to provide a high volume of air movement while maintaining static pressure. Its aerodynamic design minimizes resistance, enhancing overall efficiency. The fan is designed to operate across a range of static pressures, making it versatile for different applications, from commercial kitchens to large manufacturing facilities.

Additionally, the fan's installation is straightforward, thanks to its user-centric design. The model incorporates mounting brackets and options for various duct configurations, ensuring seamless integration into existing systems. Maintenance is also made easier with accessible components, allowing technicians to perform regular checks and upkeep without extensive downtime.

Safety features are a priority in the design of the Greenheck Fan 470654. It includes protective features such as thermal overload protection to prevent motor damage and extend operational life. The fan's design also adheres to industry standards and regulations, providing peace of mind for users.

In summary, the Greenheck Fan 470654 is a well-engineered solution that combines durability, efficiency, and advanced technology to deliver superior performance in ventilation applications. With its powerful motor, energy-saving capabilities, and ease of installation and maintenance, it stands out as a reliable choice for professionals seeking optimal airflow management.